If you ever fought, this is a handy reference.
Here’s a DEV write-up on a free world time API that needs no sign-ups or API keys, and it’s frontend-friendly via CORS. CORS enabled time API
What I liked:
- Offsets + dst flag included
- an /ip endpoint for timezone auto-detect
- Simple GET requests
Full post: https://dev.to/time-now-api/i-built-a-free-open-world-time-api-no-api-keys-cors-enabled-5en
If you work on frontend countdowns. Hope it helps.